Transferring As-I Analog Values - Siemens DP/AS-Interface Link 20E Manual

Data Exchange Between the DP Master and AS-i Slave
2.4

Transferring AS-i Analog Values

Purpose
This section explains how you can access analog values of attached AS-i slaves in
the user program of the DP master.
Notice
The following explanations apply only to AS-i slaves that handle analog value
transfer in compliance with the AS-i slave profile 7.3 or 7.4.
Analog value transfer in compliance with AS-i slave profile 7.1/7.2 is not supported
by the DP/AS-i Link 20E. In this case, analog transfer must be implemented in
your software.
Analog Interface Between the DP Master and
Analog values are read and written using the acyclic services of PROFIBUS-DP
V1. In the user program of the DP master you use the read_record and
write_record services.
You can operate up to 31 AS-i slaves each with up to 4 analog input or 4 analog
output values. You access the analog values using up to 8 data records (data
record numbers 140–147).
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DP/AS-i Link 20E
DP/AS-Interface Link 20E
C79000-G8976-C138–04
Release 11/2002